simple form: add wrapped and loading... buttons #5542

the loading... text on the buttons was not capitalized before.

So in order to change this in a (more or less) single place i added
new button types to simple_form:

button :wrapped - normal button, with loading and an optional cancel button wrapped in the classical bootstrap action div.
    cancel option contains the url to go to when canceling.

button :loading - simple button with loading text capitalized by using i18n (simple_form.buttons.loading)

Conflicts:
	engines/support/app/views/tickets/new.html.haml
using simple_form for the last form that was not using it.
ensure buttons are properly loading... and reset
move open and close buttons into status display

They do not save any changes. So i think it's better to keep them separated from the Save button that does save changes.
make test independent of button tag

input or button can be used
use i18n keys for signup & login buttons
Merge pull request #150 from azul/bugfix/5542-capitalize-loading

Bugfix/5542 capitalize loading